#661C03
Closest named color: Reddy Brown (#6E1005). oklch(34.4% 0.111 37.2), rgb(102, 28, 3).
Aa
White text reads best on this color (12.12:1).
About this color
#661C03 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.111 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.023 away. White text reads best on it, at 12.12:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.111) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.73:1 |
| White text | 12.12:1 |
Values
| HEX | #661C03 |
| RGB | rgb(102, 28, 3) |
| HSL | hsl(15, 94%, 21%) |
| OKLCH | oklch(34.4% 0.111 37.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #661C03 | 12.12:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #661C03 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #661C03 text on white | 12.12:1 | AAA | Lc 96.7 | Preferred for body text |
| #661C03 text on black | 1.73:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F6CFC4
oklch(88.5% 0.047 36.3)
-
Step 300
300
#F1AE9B
oklch(80.9% 0.084 36.5)
-
Step 400
400
#E68063
oklch(70.6% 0.133 36.7)
-
Step 500
500
#DC5B34
oklch(63.1% 0.171 37.2)
-
Step 600
600
#C73B01
oklch(55.5% 0.185 37.1)
-
Step 700
700
#A93100
oklch(49.2% 0.163 37.3)
-
Step 800
800
#8C2700
oklch(42.8% 0.142 37.3)
-
Step 900
900 (this color)
#661C03
oklch(34.4% 0.111 37.2)
-
Step 950
950
#42170A
oklch(26.9% 0.071 37.3)
#661C03 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #322B00 | 0.114 |
| Deuteranopia (no green cones) | #443C00 | 0.103 |
| Tritanopia (no blue cones) | #710218 | 0.045 |
| Achromatopsia (no color) | #363636 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661C03
#661C03
oklch(34.4% 0.111 37.2)
- #00404E
#00404E
oklch(34.3% 0.062 218.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #661C03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.023
- Blood #770001 ΔE 0.042
- Chestnut #742802 ΔE 0.043
- Claret #680018 ΔE 0.047
- Maroon #800000 ΔE 0.057
- Wine Red #7B0323 ΔE 0.064
- Burgundy #610023 ΔE 0.065
- Bordeaux #7B002C ΔE 0.075
Use #661C03 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.